Ship drive

Abstract

The invention relates to a ship drive (100) for driving a ship, comprising a nacelle (1) having a housing (150), at least one accessory receptacle (10) being provided on the housing (150) for positively receiving an accessory (2).

Description

Technical Field

[0001] The invention relates to a boat drive for driving a boat, such as a sports boat. Background Art

[0002] It is known that fins are arranged in the engine compartment of a ship's ship drive, for example in the form of an outboard motor, in order, for example, to improve the fluid dynamics of the engine compartment or to protect a propeller arranged in the engine compartment against slight bottoming out or when parked on land and against objects suspended in the water, such as, for example, wood or weeds.

[0003] Typically, the fins are cast directly onto the nacelle or are formed in one piece with the nacelle. This has the disadvantage that the entire nacelle must be replaced when the fins are damaged.

[0004] It is also known that the fins are removably configured, wherein the fins are screwed directly to the engine compartment. However, this may cause galvanic corrosion due to the direct contact with the screws, and the replacement process of the damaged fins can only be performed with the aid of tools. Summary of the invention

[0005] Starting from the known prior art, the object of the present invention is to provide an improved boat drive for driving a boat and a corresponding accessory.

[0006] The object is achieved by a ship drive for driving a ship having the features of the invention. The above-mentioned objects are also achieved by an accessory for a ship drive having the features of the invention. Advantageous developments of the ship drive and the accessory are apparent from the present description and the accompanying drawings.

[0007] Correspondingly, a ship drive for driving a ship is proposed, which comprises an engine compartment, a housing and a connecting shaft, wherein the engine compartment can be connected to the ship by means of the connecting shaft, wherein according to the invention at least one accessory receptacle is provided on the housing for positively lockingly accommodating an accessory.

[0008] The boat drive can be, for example, an outboard motor, which is typically mounted on the stern beam of the boat. The boat drive can also be, for example, a pod drive, which is arranged below the waterline of the boat at the mounting plate.

[0009] In the housing of the nacelle, an electric motor is usually accommodated, which drives a propeller, which then generates thrust through the water. The electric motor typically transmits its power to a propeller arranged on a propeller shaft, wherein a transmission can be arranged between the electric motor and the propeller shaft. However, the propeller can also be arranged directly on the output shaft of the electric motor.

[0010] The direction in which the water flows toward the engine room during the forward travel of the boat is referred to herein as the flow direction. Therefore, the water flows along the engine room in the flow direction.

[0011] The accessory receiving portion is used to receive the accessory in a form-fitting manner. Therefore, the accessory can first be fixed to the engine compartment only by form-fitting and without additional fixing means, thereby enabling reliable retention of the accessory and simple replacement of the accessory.

[0012] The housing of the engine compartment can have one or more accessory receptacles, so that one or more accessories can be accommodated in the engine compartment. It is therefore particularly feasible to replace accessories with one another in order to prepare the boat drive for a specific use.

[0013] For example, if the boat is to be taken from clear lake water to a weedy environment, the small fins can be replaced by weed guards. Or, if the control effect of the fins should be increased when converting the boat drive from a small boat to a larger boat, the small fins can be replaced by larger fins. Or, if the boat drive is to be prepared for use in a hydrofoil boat, the fins can be replaced by foils.

[0014] The accessory receptacle can be designed as a T-shaped profile in order to provide a correspondingly secure form fit between the accessory and the engine compartment.

[0015] The T-shaped profile can taper in the opposite direction of the flow, preferably in a wedge-shaped or conical manner. Thus, by inserting an accessory which is designed with a receptacle that matches the accessory receptacle, it is possible to securely hold the accessory on the engine compartment. Due to the tapering shape, in particular the wedge-shaped or conical shape, the accessory can also be fastened to the accessory receptacle in a friction-fitting or force-fitting manner. Thus, the accessory can also be pushed into a position without play.

[0016] Due to the tapering counter to the flow direction, it is also achieved that the inflowing water and the slight bottoming out press the accessories onto the accessory receptacle.

[0017] The accessory receptacle can be designed accordingly as a conically tapering T-shaped profile. The T-shaped profile has a "T" shape in any cross section, wherein the "T" extends away from the housing. To a certain extent, the upper crossbar of the "T" can be arranged at a distance from the housing, so that a holding force can be applied to the crossbar and longitudinal beam of the "T" by means of corresponding accessories.

[0018] A "T" shaped profile can include all profiles that have a narrower expansion at the housing of the nacelle than at the side away from the nacelle. For example, a "T" shaped profile also includes a "Y" shaped profile or a "V" shaped profile in this understanding.

[0019] By means of a possible wedge-shaped or conical embodiment, a positive connection can be produced between the accessory and the accessory receptacle, so that an optimal transmission of forces from the accessory to the engine compartment and vice versa can be achieved.

[0020] A positive connection is particularly advantageously obtained here if the T-slot of the accessory and the T-shaped profile of the accessory receptacle preferably touch over the entire surface.

[0021] In particular, a friction-locking and / or force-locking connection can also be achieved thereby, so that the accessory can be pushed onto the accessory receptacle in a clampable manner.

[0022] The groove for the accessory is, in a manner of speaking, an undercut of the outer contour of the accessory receptacle.

[0023] For example, an accessory with a T-shaped slot can be pushed onto a T-shaped accessory receiving portion in a manner opposite to the tapered shape. Thus, the slot of the accessory is pushed onto the profile of the accessory receiving portion and clamped in a force-fitting manner as necessary.

[0024] The tapering can also ensure tolerance compensation in particular, so that a stable connection between the accessory receptacle and the accessory is achieved despite certain manufacturing tolerances. To a certain extent, the accessory can form a friction-fitting connection further forward or further back on the tapered accessory receptacle, depending on whether the groove of the accessory with different tolerances is narrower or wider.

[0025] By fastening the accessory and the housing of the nacelle to each other detachably, i.e. in particular not screwing them together, a simplified casting structure of the housing of the nacelle can be achieved, since the accessory does not have to be included in the casting mold, but only the universally usable accessory receptacle. At the same time, different materials can be used for the nacelle and the accessory.

[0026] If the attachment is for example subjected to a collision due to bottoming out or floating cargo, damage to the engine compartment can also be reduced by the releasable fixing. In particular, the attachment can be simply replaced thus, thus improving the serviceability of the boat drive.

[0027] The accessory holder can be designed to taper in the opposite direction of the flow direction. This allows the accessory to be pushed onto the tapering profile of the accessory holder in the flow direction. This allows the accessory to be fixed to the accessory holder in a self-tight manner to a certain extent.

[0028] The accessory receptacle can have a fastening groove for providing a form-fitting and / or friction-fitting fastening of the accessory on the accessory receptacle, in particular for receiving a clamping portion of the accessory in the fastening groove.

[0029] The fastening groove can be, for example, a hole or a cutout or a recess in the profile of the accessory holder. The clamping part can be, for example, a bolt, preferably a fastening bolt or a split pin. However, the clamping part can also be a bolt with a nut. The clamping part preferably extends vertically through the profile of the accessory holder.

[0030] In other words, the clamping portion can be realized via the through-hole and via the fastening groove.

[0031] For example, the accessory can be pushed onto the accessory receiving part in a form-fitting manner so that the through opening of the accessory is aligned with the fastening groove of the accessory receiving part. Then, the bolt or screw can be guided through the through opening and the fastening groove. The accessory can be correspondingly prevented from slipping along the accessory receiving part by the clamping part, while the connection between the groove of the accessory and the profile of the accessory receiving part prevents the accessory from slipping away from the housing of the engine compartment.

[0032] The fastening groove can have tolerance compensation, so that even if the final position of the accessory on the accessory receiving portion is different due to manufacturing tolerances, clamping can still be performed. For example, this can be achieved in the following way: the fastening groove has a larger spatial stamping than the through opening.

[0033] The accessory can also have a recess at the through-opening for accommodating the clamping part. For example, such a recess can be such that a screw head or a nut can be sunk into the accessory so that the fluid dynamics of the accessory are not impaired by the clamping part. For example, it is also possible for a cotter pin of a fastening bolt to be located in the recess.

[0034] At least two accessory receptacles can be arranged at the housing, preferably in a symmetrical arrangement about the direction of travel. Thus, except the fin, other accessories can also be arranged at the engine compartment and replaced mutually if necessary, so that the boat drive is adapted to a specific area of ​​use.

[0035] An accessory can be accommodated on the accessory receptacle preferably in a form-fitting manner, wherein the accessory is preferably a fin, a flap, a weed guard, a scoop or a hydrofoil.

[0036] The fins are typical wear parts of the nacelle, so that they can be replaced particularly easily. Hydrofoils are wing-shaped fins that generate additional buoyancy. Weed guards can be used, for example, in swampy waters to resist vegetation and floating wood. The flow guide can be, for example, a Cote flow guide, which improves the flow on the propeller.

[0037] Thus, depending on the intended use of the sports boat, matching accessories can be selected without having to transform the engine compartment of the boat drive.

[0038] Furthermore, an accessory for the above-mentioned boat drive is also proposed, wherein according to the invention a groove is provided which is configured for positive engagement with an accessory receptacle of the engine compartment.

[0039] The groove can be designed to taper and preferably to be T-shaped and can taper in a wedge-shaped or conical manner.

[0040] A through-opening may be provided which is designed to receive a clamping part, wherein the clamping part extends through a fastening groove of the accessory receptacle in the received state.

[0041] The through-opening of the attachment can have a recess for accommodating the clamping part.

[0042] Preferably, the attachment is a fin or a hydrofoil or a wing or a weed guard or a kote guide.

[0043] The connecting shaft can be connected to the housing, preferably to the middle part of the housing.

[0044] The accessory receptacle can be arranged relative to the position at which the connecting shaft is connected to the engine compartment or at an angle to said position.

[0045] The abovementioned objects are also achieved by a sports boat having a boat drive according to the invention.

[0046] Correspondingly, a ship is proposed, which comprises the above-mentioned ship drive.

[0047] In this case, the boat can be, in particular, an electric boat, or the engine in the engine room can be an electric motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Other preferred embodiments of the present invention are described in detail by the following description of the accompanying drawings. It is shown here:

[0049] Figure 1 A schematic perspective view of an engine compartment of a boat drive with accessory receptacles is shown;

[0050] Figure 2 Show Figure 1 A schematic three-dimensional detail view of the accessory receiving portion in FIG.

[0051] Figure 3 Schematic perspective views showing accessories in the form of fins that can be accommodated in the accessory receiving portion from different angles;

[0052] Figure 4 Show Figure 3 A schematic cross-sectional view of a T-slot of an attachment in FIG.

[0053] Figure 5 Shown with accessories installed Figure 1 A schematic perspective view of an engine compartment of a boat drive in FIG.

[0054] Figure 6 A schematic cross-sectional view showing the accessories of the previous figures mounted at the engine compartment;

[0055] Fig. 7A , B shows a further schematic sectional view of an embodiment of a T-shaped profile and a T-shaped groove for receiving at an alternative accessory receiving portion; and

[0056] Figure 8 A schematic perspective view of a further engine compartment with an alternatively arranged accessory receptacle is shown. DETAILED DESCRIPTION

[0057] Preferred embodiments are described below with reference to the drawings. Identical, similar or identically acting elements are provided with the same reference numerals in different drawings, and a repeated description of these elements is partially omitted in order to avoid redundancy.

[0058] exist Figure 1 1 shows a schematic perspective view of a boat drive 100 for driving a boat, wherein only the engine compartment 1 which is usually arranged under water in the operating state is shown in detail in the boat drive 100. The engine compartment 1 of the boat drive 100 carries a propeller shaft 120, on which a propeller (not shown here) is arranged, which then generates the actual thrust for the boat in the water.

[0059] In a preferred embodiment, an electric motor for driving the propeller shaft 120 is provided in the nacelle 1. A transmission mechanism may also be provided in the nacelle 1 in addition for reducing or increasing the torque provided by the electric motor at its output shaft, wherein the transmission mechanism is then typically provided between the output shaft of the electric motor and the propeller shaft 120 of the nacelle 1. If there is no transmission mechanism, the output shaft of the electric motor may however also be identical to the propeller shaft 120. Electronic components and wiring for the operation of the electric motor may also be provided in the nacelle 1.

[0060] The nacelle 1 of the ship drive 100 is connected to the ship and, if applicable, to further components of the ship drive 100 via a connecting shaft 110 indicated in the figure. The connecting shaft 110 provides a mechanical connection and can accommodate further mechanical and / or electrical components.

[0061] For example, the connecting shaft 110 may be hollow and accommodate lines for supplying electric energy to an electric motor accommodated in the nacelle 1 and / or lines for transmitting control commands and / or lines for transmitting sensor data.

[0062] The boat drive 100 can be, for example, an outboard motor for driving a boat, wherein in the outboard motor, the connecting shaft 110 is then used to connect the engine compartment 1 with the components of the outboard motor located above the water surface, such as, for example, the stern beam frame, the rudder and / or the drive battery. The connecting shaft 110 is shown in the figure as a tube, but can also have a more fluid-dynamically favorable design or be surrounded by a fluid-dynamically favorable profile.

[0063] The ship drive 100 may alternatively be, for example, a pod drive for a ship, wherein the nacelle 1 is connected via a connecting shaft 110 to a mounting plate (not shown here) which is arranged in the underwater region of the ship.

[0064] The engine compartment 1 of the boat drive 100 has a housing 150, which is designed to accommodate, hold and / or store at least the above-mentioned components of the boat drive 100. The housing 150 is Figure 1 In the embodiment shown in FIG. 1 , there is at least one middle part 152, a front cover 154 and a rear cover 156. The housing parts 152, 154, 156 can be screwed or glued to one another and can be sealed relative to one another and to the environment in order to form a sealed interior space (not shown in detail here) in which the mentioned electrical or mechanical components can be accommodated.

[0065] The middle portion 152 is located at the bottom of the boat drive 100. Figure 1 In the embodiment shown in FIG. 1 , the connecting shaft 110 is connected.

[0066] The middle part 152 of the housing 150 can be provided as a die casting, for example an aluminum die casting. The front cover 154 and the rear cover 156 can also be made of aluminum. However, it is also feasible that the housing parts are made of plastic or other metals. Seals can be inserted between the housing parts to seal the interior space relative to the environment.

[0067] An accessory receiving portion 10 is provided at the lower side of the housing 150 . In the illustrated embodiment, the accessory receiving portion 10 is provided at the middle portion 152 of the housing 150 and is positioned substantially opposite to the engagement portion of the connecting shaft 110 at the middle portion 152 of the housing 150 .

[0068] The positioning of the accessory receptacle 10 on the housing 150 can however be selected depending on the accessory to be received. Two or more accessory receptacles 10 can also be provided in order to receive corresponding accessories on the housing 150 .

[0069] The accessory holder 10 can be formed, for example, in one piece with a housing 150 of the engine compartment 1 and in particular with a central part 152 of the housing 150 . For this purpose, the accessory holder 10 is cast on the central part 152 of the housing 150 , for example.

[0070] Alternatively, the accessory receptacle 10 can also be provided initially as a separate part and then screwed, glued or welded to the housing 150 of the engine compartment 1 , for example to the central part 152 of the housing 150 .

[0071] exist Figure 2 1 shows a detailed detail of a central part 152 of a housing 150 of the engine compartment 1 in the region of the accessory holder 10. In the embodiment shown, the accessory holder 10 is formed integrally with the central part 152 of the housing.

[0072] The accessory holder 10 is designed here as a T-shaped profile in any cross section. The T-shaped profile has a longitudinal beam 14, which extends radially away from the housing of the engine compartment 1, and a cross beam 16, which is arranged on the longitudinal beam 12. The longitudinal beam 14 and the cross beam 16 together form the accessory holder 10, which provides a bottom recess, on which the accessories can be securely held in a positively locking manner.

[0073] The T-shaped profile is thinner at its front end 160 in the flow direction S than at its rear end 162 , so that an accessory can be pushed onto the accessory receptacle 10 and can then reliably reach a positively locking reception position.

[0074] In the embodiment shown, this is a crossbeam 16 which thickens over its length from the front end 160 towards the rear end 162 and forms a wedge-shaped structure there. At the front end 160, the crossbeam 16 has a first thickness DQ1 and at the rear end 162 has a second, greater thickness DQ2.

[0075] In other words, the T-shaped profile is designed to taper in a wedge-shaped manner opposite to the flow direction S in the embodiment shown.

[0076] If for example the width of the crossbeam 16 is also formed in a wedge shape across the length, the T-shaped profile can also be formed taperingly overall. In addition, in the tapered T-shaped profile, not only the longitudinal beam 14, but also the crossbeam 16 can be tapered.

[0077] In this context, flow direction S is understood to be the direction of the water flowing in during forward operation of the boat drive 100 .

[0078] The thickness DL of the longitudinal beam 14 and the thickness DQ1 , DQ2 of the transverse beam 16 can each be designed differently. However, it is also possible for the thickness of the longitudinal beam 14 and the transverse beam 16 to be equal along the T-shaped profile and to achieve a conical taper in this way.

[0079] The T-shaped profile can have rounded corners, thereby simplifying the installation of accessories (not shown in the figures).

[0080] Furthermore, the accessory receiving portion 10 has a fastening groove 12. The fastening groove 12 is Figure 2 1 is shown as a recess 12 in the accessory holder 10 .

[0081] However, in an alternative embodiment, the fastening groove 12 can also be a hole in the longitudinal beam 14 of the accessory holder 10. In particular, the hole can be a round hole or an elongated hole. The hole can also have a rectangular cross section.

[0082] exist Figure 3 The attachment 2 in the form of a fin is shown from two different angles. Figure 4 A cross-sectional view of the attachment 2 is shown in FIG.

[0083] In the embodiment shown, the attachment 2 is a fin, which can be connected to the nacelle 1 via the attachment receptacle 10. The attachment 2 accordingly has a T-slot 20, which is suitable for receiving the T-shaped profile of the attachment receptacle 10, in order to provide a form-fitting connection of the attachment 2 to the housing 150 of the nacelle 1 in this way.

[0084] The T-slot 20 can be designed to taper in a wedge-shaped or conical manner to match the shape of the accessory holder 10 , so that the accessory 2 can be pushed onto the accessory holder 10 in the flow direction S and finally accommodated in a form-fitting manner in the direction of the longitudinal extension of the accessory holder 10 .

[0085] The locking of the accessory 2 received in a form-fitting manner on the accessory receptacle 10 can be realized in a form-fitting and / or friction-fitting and / or force-fitting manner.

[0086] It is particularly advantageous here if the T-shaped profile of the accessory holder 10 contacts the T-shaped groove 20 of the accessory 2 over the entire surface in the fully inserted position in order to ensure an optimal force transmission and provide a play-free positive fit.

[0087] As described above, the T-slot 20 can taper in particular in a wedge-shaped or conical manner opposite to the flow direction S, so that the attachment 2 is pressed onto the T-shaped profile and held there not only by the initial insertion but also by the inflow of water. To a certain extent, this can achieve a self-tightening fixation of the attachment 2 that also withstands possible slight bottoming out.

[0088] A through-hole 22 is present in the attachment 2 , which extends through the T-slot 20 . The through-hole 22 can be used to guide a bolt or a pin through the attachment 2 in order to fasten and / or clamp the attachment 2 on the attachment receptacle 10 of the generator nacelle 1 .

[0089] As in Figure 5 and Figure 6As shown in the figure, the clamping portion 24 can be realized by the through hole 22 and the fastening groove 12. For this purpose, the accessory 2 is fixed to the accessory receiving portion 10 so that the fastening groove 12 and the through hole 22 are overlapped. This can be done, for example, by pushing the accessory 2 onto the accessory receiving portion 10. It is thus possible to perform a corresponding clamping so that the accessory 2 is fastened to prevent it from slipping off along the longitudinal expansion of the accessory receiving portion 10.

[0090] Such a clamping part 24 can be, for example, a bolt, preferably a bolt with a fastening cotter pin, or a bolt with a nut. The screwed clamping part 24 is shown in the figure, wherein the bolt is guided through the through-hole 22 and the fastening groove 12. The attachment 2 is finally fixed by tightening the nut and bolt.

[0091] By guiding the bolt or screw through the fastening groove 12, the accessory 2 is also secured in a form-fitting manner against being pushed out of the form-fitting connection with the accessory receptacle 10. It can thus be ensured that the accessory 2 is securely held at the accessory receptacle 10.

[0092] The attachment 2 can in particular have a recess 220 at the through-opening 22 (see for example Figure 3 In order to thereby hold the bolt head and the nut below the surface of the attachment 2. The recess can be designed, for example, in the form of a hexagonal nut, so that a counter force is exerted when the bolt is screwed into the nut, wherein the bolt head is then arranged in the recess.

[0093] The provision of the recess 220 improves in particular the fluid dynamics of the attachment 2 .

[0094] FIG. 7 shows another possible profile for the design of the accessory receiving portion 10, which profile is a T-slot, in particular Fig. 7A The Y-slot and Figure 7B The V-groove in the

[0095] exist Figure 8 1 shows a further embodiment of a nacelle 1 of a boat drive 100 . The general construction corresponds to that already described above.

[0096] However, in this embodiment, the position of an additional or alternative accessory receptacle 10' is shown by way of example, which is not arranged opposite the engagement portion of the connecting shaft 110 but at a position of approximately 90° with respect to the circumferential angle of the middle portion 152 of the housing 150.

[0097] In other words, the accessory receiving portion 10' is provided at different positions on the middle portion 152. Depending on the application, the accessory receiving portions 10, 10' are provided at suitable positions on the housing 150 of the engine compartment 1 in order to hold the required accessories.

[0098] All accessory receptacles 10 , 10 ′ have in common that they are provided for receiving accessories.

[0099] In the figures, only fins are shown as accessories. However, it is also possible to provide weed covers, cotter ducts, other fins, wing panels and / or hydrofoils in addition to or as an alternative to the fins and to securely hold them on the accessory receptacles 10 , 10 ′.

[0100] In a further alternative, two or more nacelles 1 of the boat drive 100 can also be connected to one another via corresponding accessory receptacles 10 , 10 ′ in order to provide a twin-engine or multi-engine drive having a plurality of nacelles which are then held via a common connecting shaft 110 .

[0101] As far as applicable, all individual features shown in the exemplary embodiments may be combined with one another and / or exchanged without departing from the scope of the present invention.

[0102] Reference numerals list

[0103] 1 Engine compartment

[0104] 10, 10' Accessory storage

[0105] 12 Fastening slot

[0106] 14 Stringer

[0107] 16 Beam

[0108] 100 Boat Drive

[0109] 110 Connecting shaft

[0110] 120 Propeller shaft

[0111] 150 Shell

[0112] 152 Middle part of the shell

[0113] 154 Front cover of housing

[0114] 156 Housing back cover

[0115] 160 Front end portion of accessory storage portion

[0116] 162 Rear end portion of accessory storage portion

[0117] 2 Attachments

[0118] 20 slots

[0119] 22 Through opening

[0120] 220 blank space

[0121] 24 Clamping part

[0122] S Flow direction

[0123] DL Thickness of the longitudinal beam

[0124] DQ1 The thickness of the beam at the front end

[0125] DQ2 Thickness of the beam at the rear end

Claims

1. A ship drive (100) for driving a ship, the ship drive comprising an engine compartment (1) having a housing (150) and a connecting shaft (110), wherein the engine compartment (1) can be connected to the ship by means of the connecting shaft (110), It is characterized in that At least one accessory receiving portion (10) is provided on the housing (150) for receiving an accessory (2) in a form-fitting manner.

2. The boat drive (100) according to claim 1, It is characterized in that The accessory receptacle (10) is designed as a T-shaped profile.

3. The boat drive (100) according to claim 2, It is characterized in that The T-shaped profile tapers counter to the flow direction (S), preferably in a wedge-shaped or conical manner.

4. The boat drive (100) according to any one of the preceding claims, It is characterized in that The accessory holder (10) is formed integrally with the housing (150) and / or is connected to the housing (150) in a materially bonded manner and / or is cast onto the housing (150).

5. The boat drive (100) according to any one of the preceding claims, It is characterized in that The accessory receiving portion (10) has a fastening groove (12) for providing a form-fitting and / or friction-fitting fastening of the accessory (2) on the accessory receiving portion (10), in particular for accommodating a clamping portion (24) of the accessory (2) in the fastening groove (12).

6. The boat drive (100) according to claim 5, It is characterized in that The fastening groove (12) has tolerance compensation.

7. The boat drive (100) according to any one of the preceding claims, It is characterized in that At least two accessory receptacles (10) are arranged on the housing (150), preferably in a symmetrical arrangement with respect to the direction of travel.

8. The boat drive (100) according to any one of the preceding claims, It is characterized in that An accessory (2) is received in the accessory receiving portion (10) in a form-fitting manner, wherein the accessory (2) is preferably a fin, a wing, a weed guard, a kot or a hydrofoil.

9. The boat drive (100) according to any one of the preceding claims, It is characterized in that The connecting shaft (110) is connected to the housing (150), preferably to a middle portion (152) of the housing (150).

10. The boat drive (100) according to any one of the preceding claims, It is characterized in that The accessory receiving portion (10) is arranged relative to the position where the connecting shaft (100) is connected to the engine compartment (1) or at an angle to the position.

11. An accessory (2) for a boat drive (100) according to any one of the preceding claims, It is characterized in that A groove (20) is provided, which is configured to engage with the accessory receiving portion (10) of the housing (150) of the engine compartment (1) in a form-fitting manner.

12. The accessory (2) according to claim 11, It is characterized in that The groove (20) is T-shaped and preferably tapers in a wedge-shaped or conical manner.

13. An attachment (2) according to claim 11 or 12, It is characterized in that A through opening (22) is provided for receiving a clamping portion (24), wherein the clamping portion (24) extends through the fastening groove (12) of the accessory holder (10) in a received state.

14. The accessory (2) according to claim 13, It is characterized in that The through-opening (22) has a recess (220) for accommodating the clamping portion (24).

15. An accessory (2) according to any one of claims 11 to 14, It is characterized in that The accessory (2) is a fin or a hydrofoil or a wing plate or a weed guard or a Kote guide tube.

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